When testing a power supply, the greatest questions I have are going to always be as follows. How well is the PSU designed? How stable are the power rails? Can it produce its rated wattage reliably? Some worthwhile attention has been given to its overall design right down to the circuits. The OCZ 800 Watt EliteXStream Power Supply is obviously very well designed to produce 800 Watts of power, maintain steady, reliable voltages, and protect your system by offering very clean power without fail. Add the 80 Plus efficiency feature and you have the 800 Watt Editor's Choice